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目的探讨新生儿室管膜下-脑室内出血(SEH/IVH)、脑内出血在磁敏感加权成像(SWI)上的表现。资料与方法搜集新生儿重症监护病房的97例新生儿并同时行头颅MR常规序列(T1WI、T2WI)和SWI序列的扫描。结果 97例新生儿SWI共检出SEH/IVH13例,大脑实质内出血(IPH)7例,小脑内出血(ICEH)10例。常规MR序列检出SEH/IVH8例,IPH3例,ICEH5例。SEH/IVH、IPH、ICEH在SWI上表现为多发斑点状、类圆形、不规则形或铸形的低信号,类球形出血灶在相位图上表现为X-Y轴平面中间层面中心为低信号,外周为高信号,Z轴前后两极层面为低信号。结论较常规MR序列,SWI能更敏感地显示SEH/IVH、IPH、ICEH,表现为典型顺磁性物质的信号特征。
Objective To investigate the performance of neonatal subependyme - intraventricular hemorrhage (SEH / IVH) and intracerebral hemorrhage on magnetic susceptibility weighted imaging (SWI). Materials and Methods Ninety-nine newborns in the neonatal intensive care unit were collected and scanned simultaneously with conventional MR sequences (T1WI, T2WI) and SWI. Results Seventy seven neonates with SWI were detected in 13 cases of SEH / IVH, 7 cases of intraparenchymal hemorrhage (IPH) and 10 cases of intracerebral hemorrhage (ICEH). Conventional MR sequence detected SEH / IVH8 cases, IPH3 cases, ICEH5 cases. SEH / IVH, IPH and ICEH are characterized by multiple speckles, round, irregular or cast low signal on SWI. The spheroidal hemorrhagic lesions show low signal on the phase diagram for the center of XY plane, Peripheral high signal, Z-axis before and after the bipolar level is low signal. CONCLUSIONS: Compared with conventional MR sequences, SWI can display SEH / IVH, IPH and ICEH more sensitively, showing signal characteristics of typical paramagnetic substances.